how Replace coma (,) in text field with a newline break?

Hi i have a textarea box that user enters list of names what i've been trying to do is when retriving the data from the database the specific row .$row["name_drivers"].
when display back the data evrytime it finds a coma in that field replaces with a line break e.g
gary nevile, steven gerard, michael tyson, david ginola
instead of displaying like this displays like above
gary nevile
steven gerard
michael tyson
david ginola

i have tried

$name_drivers = str_replace(",", "\n", $name_drivers);
but no luck is it possible to achive somthing what i am trying to do
here my whole code

[PHP]$name_drivers = str_replace(",", "<br>", $name_drivers);  

 $id = $_GET['c'];

  

 $drivers = mysql_query("SELECT name,  date_of_birth, start_time, number_drivers, name_drivers, last_update, display,  DATE_FORMAT(date_of_birth, '%a %D %b %Y')  as new_date,  DATE_FORMAT(last_update, '%a %D %b %Y')  as new_update, DATE_FORMAT(start_time, '%H:%i') as timing FROM event WHERE id='$id' ");





 while ($row = mysql_fetch_assoc($drivers)) {

  if(isset($row['display']) && $row['display'] == "1") {



     echo "<p><strong>Track:</strong> ".$row["name"]."</p>"; 

     echo "<p><strong>Track:</strong> ".$row["name"]."</p>"; 

     echo "<p><strong>Date:</strong> ".$row["new_date"]."</p>"; 

     echo "<p><strong>Start Time:</strong> ".$row["timing"]."am</p>"; 

     echo "<p><strong>Number of drivers booked in:</strong> ".$row["number_drivers"]."</p>";

     echo "<p><strong>Last Update:</strong> ".$row["new_update"]."</p>";

     echo "<p><strong>List of drivers booked in:</strong> ".$row["name_drivers"]."</p>";

    

    } 

PHP:

but i get the following

 

Hi i found a solution in case anyone might needed in the future i replace this line of code

	 echo "<p><strong>List of drivers booked in:</strong> ".$row["name_drivers"]."</p>";

PHP:

With this one

echo "<p><strong>List of drivers booked in:</strong> ".str_replace(',','<br />',$row["name_drivers"])."</p>";

PHP:

 

you could also probably use the explode() and implode() functions to accomplish this